NROS 307 Study Guide - Midterm Guide: Axon Hillock, Neurodegeneration, Schwann Cell
21 Oct 2016
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Neurodegenerative diseases - lecture 21 and 22 study. What are the differences between schwann cells and oligodendrocytes? a. b. A single oligodendrocyte can extend up to 50 axons when forming the myelin sheath, a single. Schwann cell can only wrap around 1 axon. Oligodendrocytes insulate axons exclusively in the cns, schwann cells insulate axons in the pns. Why does the removal of myelin cause action potentials to fail rather than just slow down: myelin plays a significant role in saltatory/discontinuous conduction. If myelin is removed we lose the discontinuous/saltatory conduction which leads to the complete propagation of an action potential. b. What is the evidence that vitamin d plays a role in the development of ms: ms is thought to affect about 2. 3 million people worldwide. What are the main symptoms of parkinson"s disease: bradykinesia, forward tilt to posture, short, shuffling gait, blank facial expression, non-motor symptoms, depression increased sweating b, difficulty speaking.
